Cita APA (7a ed.)

Webster,F.V. et.al. (1966). Traffic signals. Her Majesty's Stationery Office.

Cita Chicago Style (17a ed.)

Webster,F.V. et.al. Traffic Signals. London: Her Majesty's Stationery Office, 1966.

Cita MLA (9a ed.)

Webster,F.V. et.al. Traffic Signals. Her Majesty's Stationery Office, 1966.